Robust metal–organic framework with abundant large electronegative sites for removal of CO2 from a ternary C2H2/C2H4/CO2 mixture

Xiong, Cheng; Xiao, Yanhong; Liu, Qingyou; Chen, Ling; He, Chun‐Ting; Liu, Qing-Yan; Wang, Yu‐Ling

doi:10.1039/d2qi01175a

Cited by 9 publications

(8 citation statements)

References 65 publications

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“…57 The C 2 H 4 /CO 2 selectivity value is similar to those of some existing compounds such as SNNU-95 (2.4), 58 ZJNU-120(Sm) (2.4), 26 and JXNU-14 (2.6). 59 In addition, the effects of the measurement temperature and gas mixture composition on the adsorption selectivity were also researched. Temperature lowering can elevate the adsorption selectivity (Figures S7 and S8), which is expected due to the enhanced gas− framework interaction.…”

Section: Resultsmentioning

confidence: 99%

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

et al. 2023

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A great demand for high-purity C2 hydrocarbons calls for the development of chemically stable porous materials for the effective isolation of C2 hydrocarbons from CH4 and CO2. However, such separations are challenged by their similar physiochemical parameters and have not been systematically studied to date. In this work, we reported a cadmium-based rod-packing coordination framework compound ZJNU-140 of a new 5,6,7-c topology built up from a custom-designed tricarboxylate ligand. The metal–organic framework (MOF) features an aromatic-abundant pore surface, uncoordinated amine functionality, and self-partitioned pore space of suitable size. These structural characteristics act synergistically to provide the MOF with both selective recognition ability and the confinement effect toward C2 hydrocarbons. As a result, the MOF displays promising potential for adsorptive separation of C2–CH4 and C2–CO2 mixtures. The IAST-predicted C2/CH4 and C2/CO2 adsorption selectivities, respectively, fall in the ranges of 7.3–10.2 and 2.1–2.9 at 298 K and 109 kPa. The real separation performance was also confirmed by dynamic breakthrough experiments. In addition, the MOF can maintain skeleton intactness in aqueous solutions with a wide pH range of 3–11, as confirmed by powder X-ray diffraction (PXRD) and isotherm measurements, showing no loss of framework integrity and porosity. The excellent hydrostability, considerable uptake capacity, impressive adsorption selectivity, and mild regeneration make ZJNU-140 a promising adsorbent material applied for the separation and purification of C2 hydrocarbons.

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Section: Resultsmentioning

confidence: 99%

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

et al. 2023

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“…[13][14][15] In this context, a large number of porous metal organic frameworks (MOFs) with excellent properties for physisorptive separations have been developed. [16][17][18][19][20] Among them, anion pillared MOFs are a special class of MOFs consisting of a single metal ion (+2 charge), an anionic pillar (−2 charge) and a neutral linkage. [21][22][23][24][25] The existence of anions provides abundant electronegative sites for selective guest recognition.…”

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confidence: 99%

A new TIFSIX anion pillared metal organic framework with abundant electronegative sites for efficient C₂H₂/CO₂separation

Yan

et al. 2023

Inorg. Chem. Front.

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“…In particular, at 298 K and 109 kPa, the C 2 H 2 /CO 2 (1/1, v/v) adsorption selectivities were predicted to be 4.66, 3.82, and 2.78 for ZJNU-132 , ZJNU-131 , and ZJNU-130 , respectively. The selectivity value of ZJNU-132 is lower than that of the several top-performing MOFs such as NCU-100 (1787), UTSA-300 (743), and CPL-1-NH 2 (119), but higher than that of some literature compounds such as FJU-90 (4.3), CAU-10-H (4.0), FUT-1 (4.0), [Ni(NH 2 -BPTC) 0.5 ] (3.5), NUM-11 (3.0), JXNU-14 (2.97), UPC-200(Fe)-F-BIM (2.94), SNNU-27-Fe (2.0), and [Ca(dtztp) 0.5 ] (1.7) . Considering that the adsorption selectivity and uptake capacity jointly dictated the separation efficiency, Krishna proposed a new index for direct comparison of the separation performance, which was termed the separation potential Δ q taking the above two metrics into account .…”

Section: Results and Discussionmentioning

confidence: 84%

Substituent Engineering-Enabled Structural Rigidification and Performance Improvement for C₂/CO₂ Separation in Three Isoreticular Coordination Frameworks

Yue

Wang

et al. 2022

Inorg. Chem.

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Construction of porous solid materials applied to the adsorptive removal of CO 2 from C 2 hydrocarbons is highly demanded thanks to the important role C 2 hydrocarbons play in the chemical industry but quite challenging owing to the similar physical parameters between C 2 hydrocarbons and CO 2 . In particular, the development of synthetic strategies to simultaneously enhance the uptake capacity and adsorption selectivity is very difficult due to the trade-off effect frequently existing between both of them. In this work, a combination of the dicopper paddlewheel unit and 4-pyridylisophthalate derivatives bearing different substituents afforded an isoreticular family of coordination framework compounds as a platform. Their adsorption properties toward C 2 hydrocarbons and CO 2 were systematically investigated, and subsequent IAST and density functional theory calculations combined with column breakthrough experiments verified their promising potential for C 2 /CO 2 separations. Furthermore, the substituent engineering endowed the resulting compounds with simultaneous enhancement of uptake capacity and adsorption selectivity and thus better C 2 /CO 2 separation performance compared to their parent compound. The substituent introduction not only mitigated the framework distortion via fixing the ligand conformation for establishment of better permanent porosity required for gas adsorption but also polarized the framework surface for host−guest interaction improvement, thus resulting in enhanced separation performance.

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Robust metal–organic framework with abundant large electronegative sites for removal of CO₂ from a ternary C₂H₂/C₂H₄/CO₂ mixture

Abstract: Separation of ternary gases mixtures is challenging and has rarely been achieved with a single porous solid material. Herein a trinuclear iron (III) based metal-organic framework (MOF) with high water...

Cited by 9 publications

References 65 publications

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

A new TIFSIX anion pillared metal organic framework with abundant electronegative sites for efficient C₂H₂/CO₂separation

Substituent Engineering-Enabled Structural Rigidification and Performance Improvement for C₂/CO₂ Separation in Three Isoreticular Coordination Frameworks

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Robust metal–organic framework with abundant large electronegative sites for removal of CO2 from a ternary C2H2/C2H4/CO2 mixture

Abstract: Separation of ternary gases mixtures is challenging and has rarely been achieved with a single porous solid material. Herein a trinuclear iron (III) based metal-organic framework (MOF) with high water...

Cited by 9 publications

References 65 publications

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C2 Hydrocarbons

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C2 Hydrocarbons

A new TIFSIX anion pillared metal organic framework with abundant electronegative sites for efficient C2H2/CO2separation

Substituent Engineering-Enabled Structural Rigidification and Performance Improvement for C2/CO2 Separation in Three Isoreticular Coordination Frameworks

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Robust metal–organic framework with abundant large electronegative sites for removal of CO₂ from a ternary C₂H₂/C₂H₄/CO₂ mixture

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

Integrating Self-Partitioned Pore Space and Amine Functionality into an Aromatic-Rich Coordination Framework with Ph Stability for Effective Purification of C₂ Hydrocarbons

A new TIFSIX anion pillared metal organic framework with abundant electronegative sites for efficient C₂H₂/CO₂separation

Substituent Engineering-Enabled Structural Rigidification and Performance Improvement for C₂/CO₂ Separation in Three Isoreticular Coordination Frameworks